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/*
*Copyright (C) 1994-2000 The XFree86 Project, Inc. All Rights Reserved.
*
*Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
*"Software"), to deal in the Software without restriction, including
*without limitation the rights to use, copy, modify, merge, publish,
*distribute, sublicense, and/or sell copies of the Software, and to
*permit persons to whom the Software is furnished to do so, subject to
*the following conditions:
*
*The above copyright notice and this permission notice shall be
*included in all copies or substantial portions of the Software.
*
*THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
*EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
*MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
*NONINFRINGEMENT. IN NO EVENT SHALL THE XFREE86 PROJECT BE LIABLE FOR
*ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
*CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
*WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
*Except as contained in this notice, the name of the XFree86 Project
*shall not be used in advertising or otherwise to promote the sale, use
*or other dealings in this Software without prior written authorization
*from the XFree86 Project.
*
* Authors: Harold L Hunt II
*/
#include "textconv.h"
#include <stdio.h>
#include <stdlib.h>
/*
* Convert \r\n to \n
*
* NOTE: This was heavily inspired by, if not down right stolen from,
* Cygwin's winsup/cygwin/fhandler.cc/fhandler_base::read ()
*/
void
DOStoUNIX (char *pszSrc, int iLength)
{
char *pszDest = pszSrc;
char *pszEnd = pszSrc + iLength;
/* Loop until the last character */
while (pszSrc < pszEnd)
{
/* Copy the current source character to current destination character */
*pszDest = *pszSrc;
/* Advance to the next source character */
pszSrc++;
/* Don't advance the destination character if we need to drop an \r */
if (*pszDest != '\r' || *pszSrc != '\n')
pszDest++;
}
/* Move the terminating null */
*pszDest = '\0';
}
/*
* Convert \n to \r\n
*/
void
UNIXtoDOS (unsigned char **ppszData, int iLength)
{
int iNewlineCount = 0;
unsigned char *pszSrc = *ppszData;
unsigned char *pszEnd = pszSrc + iLength;
unsigned char *pszDest = NULL, *pszDestBegin = NULL;
#if 0
printf ("UNIXtoDOS () - Original data:\n%s\n", *ppszData);
#endif
/* Count \n characters without leading \r */
while (pszSrc < pszEnd)
{
/* Skip ahead two character if found set of \r\n */
if (*pszSrc == '\r' && pszSrc + 1 < pszEnd && *(pszSrc + 1) == '\n')
{
pszSrc += 2;
continue;
}
/* Increment the count if found naked \n */
if (*pszSrc == '\n')
{
iNewlineCount++;
}
pszSrc++;
}
/* Return if no naked \n's */
if (iNewlineCount == 0)
return;
/* Allocate a new string */
pszDestBegin = pszDest = malloc (iLength + iNewlineCount + 1);
/* Set source pointer to beginning of data string */
pszSrc = *ppszData;
/* Loop through all characters in source string */
while (pszSrc < pszEnd)
{
/* Copy line endings that are already valid */
if (*pszSrc == '\r' && pszSrc + 1 < pszEnd && *(pszSrc + 1) == '\n')
{
*pszDest = *pszSrc;
*(pszDest + 1) = *(pszSrc + 1);
pszDest += 2;
pszSrc += 2;
continue;
}
/* Add \r to naked \n's */
if (*pszSrc == '\n')
{
*pszDest = '\r';
*(pszDest + 1) = *pszSrc;
pszDest += 2;
pszSrc += 1;
continue;
}
/* Copy normal characters */
*pszDest = *pszSrc;
pszSrc++;
pszDest++;
}
/* Put terminating null at end of new string */
*pszDest = '\0';
/* Swap string pointers */
free (*ppszData);
*ppszData = pszDestBegin;
#if 0
printf ("UNIXtoDOS () - Final string:\n%s\n", pszDestBegin);
#endif
}
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